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What surprises are left for Warlords?

At BlizzCon and after, we've learned an awful lot about the next expansion, Warlords of Draenor. While there's been some conversation post-BlizzCon about whether what Warlords has in store is enough for an expansion without any new classes or races, I just wonder what surprises Warlords has left in store. With all that we already know, what does Blizzard still have up its sleeve? Is there content yet to come that will amaze us?

As we get closer to the beta date, we're sure to find out -- but in the meantime, what surprises do you think Warlords will be throwing our way? Does Blizzard have big features it's keeping under wraps -- like a new race or class? And, just as importantly, will gnomes finally find their way into a cinematic? Tell us what you think!